SEOUL (Reuters) -Shares of South Korea's Samsung Electronics jumped 4.7% and SK Hynix soared 12% on Thursday, bolstered by a deal with OpenAI to support the ChatGPT maker's expansive Stargate artificial intelligence data centre project. The partnership, announced late on Wednesday, sent Samsung shares to their highest in more than four years and SK Hynix to an all-time high, adding $37 billion to their combined market capitalisation. Their rally also propelled the benchmark KOSPI index more than 3% to ...